The tiger was seen roaming in the adjacent sanctuary area of the zoo for the last few months.
Some of Zoo staff had earlier reported the presence of a wild tiger in the forest adjacent to the zoo.
"We had also got pug marks of a feline near lion and tiger safari areas. We had fixed trap cameras to monitor its movement and had fixed a CCTV also," an official said.
The Zoo authority had set up a 20 member team to capture the tiger.
"Our team members found through the CCTV camera when it entered the first gate of the tiger safari at about 12.30 am yesterday. Immediately the gate was closed from behind," the official said.
Later, the Zoo staff closed one gate after another by tracking the movement of the tiger, said C R Mishra, deputy director of the zoo.
"It is a healthy male tiger of about 7-years-old, he added.
"It could have come in search of food," Sharma said.
Asked about the next course of action, Sharma said the Zoo authority would draw attention of the National Zoo Authority and National Tiger Conservation Authority to rehabilitation of the animal.
"We do not know whether the captured tiger will remain in Nandankanan. Presently, it is inside the tiger safari," Panda said adding that there are 24 tigers in Nandankanan zoo.
Sources said a tigress from wild had entered into Nandankanan zoo in 1967 and kept in captivity.
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